// Copyright 2007 the original author or authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package lichen.components.blob;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import lichen.components.base.ComponentResponseUtils;
import lichen.entities.IBlobModel;

import org.apache.tapestry5.StreamResponse;
import org.apache.tapestry5.services.Request;
import org.apache.tapestry5.services.Response;

/**
 * 构造一个对应Blob的Response
 * 
 * @author <a href=mailto:Ghostbb@bjmaxinfo.com>Ghostbb</a>
 * @version $Revision$
 * @since 0.0.3
 */
public class BlobResponse<T extends IBlobModel> implements StreamResponse {
	
	private T _blob;
	
	private Request _request;
	
	public BlobResponse(T blob, Request request){
		this._blob = blob;
		this._request = request;
	}

	public String getContentType() {
		return _blob.getContentType();
	}

	public InputStream getStream() throws IOException {
		return new ByteArrayInputStream(_blob.getBlobData());
	}

	public void prepareResponse(Response response) {
		try {
			ComponentResponseUtils.constructResponse(_blob.getBlobName(), null, _request, response);
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}
